Resetting clock on truck stereo

The stereo should have two 12v wires; one is switched power and the other is always on 12v power.

The memory needs always on power since there is no internal battery to remember presets.

It sounds like the keep alive wire has either become disconnected or it was never hooked up. In most cases it is a yellow cable on aftermarket car stereos

you can try removing the negative cable from the terminal on the cars battery for a few seconds (but it will reset time clock as well)

Yeah, the ground. ALWAYS, make sure the ground is good. When that switch was cut out, the ground was disconnected also. That's why the stuff don't work and and the chronometer resets and is dim. ALWAYS check the ground before ANYTHING else is done.

switch ignition on, push scroller on top of indicator stalk untill clock appears,Press end of stalk to reset

There needs to be a constant power wire for the clock in order for the clock to keep time. You are losing power completely when you shut off the engine. Changed your battery lately or had a car stereo installed?

sounds like the dealers right..internal short most likely needs to be replaced,,

There is a button on the right hand bottom of stereo that sets time hour and minutes

Check fuses. There are two fuses to this stereo. One that hold memory for the clock and stereo preset buttons and one for turning the stereo on. There are usually two fuse boxes, on inside the vehicle and one under the hood near the car's battery. Again, check ALL fuses. One is usually labeled for the radio/stereo, the other is not.
As for the CD changer, disconnect one of the main car battery terminals for several minutes. This is easier then removing the changer and acts as a reset. Possibley bringing the changer back to working condition. Otherwise, this could be a repair issue, see www.carstereohelp.com

It is the wire that has 12 volts when the key is off, use a test lite or volt meter to test this.